Square side plate



FIG. 1 is a top plan view of a square side plate of my invention;

FIG. 2 is a side elevation view of the square side plate;

FIG. 3 is a bottom plan view of the square side plate; and,

FIG. 4 is a cross-sectional view taken along section line IV--IV of FIG. 1. 

The ornamental design for a square side plate, as shown and described. 